Lifting-jack.



UNITED STATES i PATENT QFFICE.

LIIFTING-JACK.

vSpecification of Letters Patent.

Patented May 28, 1907".y

Application filed October 2, 1906. Serial No. 337,095.

'To (,z/Z wiz/0111, it may concern:

Be it known that we, WILLIAM ORsBoRN yand LOUIS GRAEBER, citizens of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented a new and useful Lifting-Jack, vof whichthe following is a specification.

This invention has relation to wagon jacks and it consists in the novel .construction and arrangement of its parts as hereinafter shown and described.

The object of the invention is to provide a jack of especial construction adapted particularly to be used for lifting carriages, wagons, etc. l

In the accompanying drawing Figure 1 is a side elevationv of the jack. Fig. 2 is a front elevation of the same. Fig. 3 is a rear elevation of the jack with parts in section. Fig. 4 is a horizontal sectional view of the jack on the line 4-4 of Fig. 1. Fig. 5 is a side elevation of the crutch member detached from the jack.

The jack comprises the base plate 1 upon which is located the spaced lugs 2. The forward end of the bar 3 is fixed between the lugs 2, 2, and the rear portion of the said bar is provided with the laterally extending lug 4. The links 5, 5 are pivoted tothe upper, outer sides of the lugs 2, 2 and the side bars 6, 6 are `pivotally attached to the upper ends of said links. The crutch member 7 is supported between the said bars 6, 6 and is adapted to be adjusted longitudinally thereof. The said member 7 is provided at its upper end with the rest 8 and with an intermediate forward portion thereof with the rest 9. The lower portionof the said member 7 is composed of the two spaced flanges 9, 9, which are provided with a pin 10, the outer upper end of which is chamfered, as shown in Fig. 1. The fianges 9, 9. are connected together by bolts and collars 10. The latch 11 is ivoted at its upper end between the said bars 16, 16 and is provided with a series of perforations 12, any one of which 1s adapted to receive the pin 10. Provision is thus made whereby the crutch member 7 may be sustained in its adjusted position,v The lever'13 is fulcrumed between the lugs 2, 2 in alinement with the pivotal points of the lower ends of the links 5, 5. The end 14 of the said lever extends at an angle to the body portion thereof and the extremity of the said end 14 is 6, 6 at a point in alinement with the pivotal pivoted between the bars y points of the upper ends of the links 5, 5'.- The washers 15, 15 space the said bars 6, 6

bars 16, 16 are attached at their upper ends to the bars 6. The guides 17,17 are attached l to the inner sides of the bars 6, 6 and guide the flanges 9, 9 of the crutch 7. The links 18 are pivotally attached at their upper ends to the bars 16 and are similarly attached at their lower ends to the bar 3. are pivoted at their upper ends to the bars 16V and links 18, and at their lower ends to the bars 6 in alinement with the upper pivots of the links 5, 5.` The spring 20 is interposed between the bars 16 and the latch 11, the tension of said spring is such as to have a tendency to normally hold the parts as illustrated in the dotted lines in Fig. 1.

From the foregoing description, it is obvious that the crutch member 7 may be adjusted in order that the jack may be adapted to lift vehicles which differ in the distances from the axles to the ground. When the lever 13 is carried down into the position as illustrated in heavy lines inFig. 1, the links 5, 5 and arms 6, 6 will be alined with relation to the lugs 2, 2, so that the parts will remain in such position without providing a catch or other means for holding said lever 13 down. Also when the free end of the lever 13 is lifted slightly and the links 5, 5 are forced. out of alinement with the lugs 2, 2, the tension of the spring 20 will force the parts into the position shown in dotted lines in Fig. 1. By reason of the fact that the pin 10 is chamfered at its end, the crutch member 7 may be pulled up to any desired height, but in order to lower the said crutch member, the lower end of the latch member 11 must be forced back against the tension of the spring 20 in order that the pin 10 may disengage the particular perforation 12 thereof that is retaining the same.

Having described our invention what we claim as new and desire to secure by Letters Patent is 1. A jack comprising a base, a lug located thereon, a link pivoted to said lug, a bar pivoted to said link, a crutch member' supported by said bar, a lever fulcrumed to the lug in alinement with the lower pivot of said link and having its working end pivoted to the bar in alinement with the upper pivot of said link.

l 2. A jack comprising a base, a lug attached thereto, a link pivoted to said lug, a bar pivfrom the working end 1 4 of the said lever. The

The links 19 1 IOO IIO

oted to said link, a crutch adjustablv supported by said bar, a lever fulcrumed to the lug in alineinent with the lower pivot of the link and having its working end pivoted to the bar in alinement with the upper pivot of the link.

3. A crutch comprising a base, a lug located thereon, a link pivoted to the lug, a bar pivoted to the link, a latch pivoted to the bar and having a series of perforations, a crutch mounted upon the bar and having a pin which enters one of the perforations of the latch, a lever fulcrumed to the lug in alinement to the lower pivot of the link and hav'- ing its upper end pivoted to the bar in alinement with the upper pivot of the link.

4. A jack comprising a base, a lug located thereon, a link pivoted to the lug, a bar pivoted to the link, a latch pivoted to the bar and having a series of perforations, a crutch mounted upon the bar and having a pin provided with a chamfered nut which enters one of the perforations of the latch, a lever pivoted to the lug in alinement with the lower pivot of the link and having the working end pivotedto the bar in alineinent with the upper pivot of the link.

5. A ack comprising a base, a lug located thereon, a link pivoted to said lug, a bar pivoted to said link, a spring actuated latch pivoted to the bar, a crutch adjustably supported by the bar and having means for engaging the latch, and a lever fulcrunied to the lugl in alinement with the lower pivot of the link and having its working end pivoted to the bar in alinement with the upper pivot of the link.

6. A jack comprising a base, a lug located thereon, a link pivoted to the lug, a bar pivl oted to the link, a crutch inen'rl'mr supported by the bar andv having at its lower portion spaced bars, a latch pivoted to the. first lsaid bar, means carried by one of the crutch liars for engaging said latch, a lever fuleruined to the lug in alineinent with the the link and having its upper the iirst said bar in alinenient pivot oll the link.

7.. Ajack comprising a base, a lug, a link, a bar and a crutch member successivelyv connected together and supported by the hase, a bar extending rearwardly from said hase, a bar extending rearward y from the first .said bar, a link connecting the last said liars together, a link connecting the last said link,

end pivoted to with the upper lower pivot of and the first said link together, a lever `fulcrumed to the lug in alineinent with the.

lower pivot oi' the first said link and having -its working end pivoted to the. .first said bar in alinement with the upper pivot oft the f irst said link.

S. Ajack comprising a hase, a lug, a link, a bar and a crutch successive/ljY connected and mounted upon said hase, a lever fulcrulned to the hase and having its working end operativelT connected with said har, a har extending rearwardlyT from the hase and a laf erally extending iioot attached to the rear end of the last said har.

In testimonyv that we clailn the foregoing as our own, we have hereto aflixed our signatures in the presence oi two witnesses.

UILLIAM ORSBOH i\'. 'LOUIS (.llAlBlCll. litnessesz FRED RmNnAnn'r, JACOB VIDLER. 

